Trisazo dyes derived from dehydro-thio-p-toluidine-sulphonic acid and resorcinol and process of making same



Patented Apr. 24, 1928. i

y 1,561,321 UNITED STATES PATENT OFFICE.

IBEBTBAM MAYER. E EAsEE,

nun JosEr ennkimn, QIlnEUEWEL'r, NEAR BASEL SWITZERLAND, ASSIGNOBB TO THE FIR! SOCIETY OF CHEMICAL INDUSTRY IN BASLIE, OI BASEL, SWITZERLAND.

TBISAZO nYEs DERIVED anon nEnYnno411110-r-'roLuInmE-suLrnonio ACID- mm nEsoncmoE AND rnocEss or MAKING sum.

NoDrawing; Application flled February 24, 192?,Serial No. 170,736, and in Switzerland Karena, 1826.

19 hydrothioparatoluidine sulphonic: acid and one molecule of a diazotizedamino-azo dyestuif of the general formula in which R and R are aromatic nuceli free from hydroxy groups which can be different in which R and R have the above mentioned signification, form dark-brown to black-brown powders which are soluble in water on addition of soda solution with yellow brown to red brown and violet brown color. They dye cotton yellow-brown to orange-brown, to red-brown and to violetbrown tints, which are remarkable by good equalizing properties and in part also by their fastness to light. The, new dyestufi's may be;discharged very well. If the new dyestuffs contain a nitroor an acetylamino group these groups may by careful reductionor careful sa'ponification be converted into NH -groups, The dyestulfs thus ob-' tained may then be further diazotized and developedon the fiber.

The following examples illustrate the 'invention,fthe parts being by weight E mample 1. The mono-azo-dyestufi from in which oneof the two ws stands for a.

radical of sulphonic acid and the other for 65 a hydrogen atom,

I 19.5 parts ofdiazotized sodiumsulphanilate and 24.5 parts of the sodium salt of Cleves acid is diazotized in the usual manner and the diazo compound combined in presence of soda with the mono-azo-dyestuft, which is ob.- tained by diazotizing 32 parts of dehydrothioparatoluidine sulphonic acid, by adding to the diazo compound thus obtained an aqueous solution of 11 parts of resorcinol and by neutralizing the mineral acid with the calculated quantity of soda. I The coupling to the trisazodyestufi is complete Jafter a short time. The dyestufl thus obtained is salted out, filtered and dried. It is. a black-brown powder which dissolves in water on addition of soda with a red-brown color. In concentrated sulphuric acid the product is soluble with dark green color. On-cottondt produces brown tints. The new dyes'tufi corresponds most.probably to the formula?- V soar The same dyestufi is also obtained by couacid and Cleves acid with resoreinol in presence of soda and by combining the disazo-dyestuif thus obtained in the usual manner with diazotized; dehydrothioparatoluidine sulphonic acid}, Similar products are obtained by substituting sulphanilic acid Dyestufls of a similar constitution are) produced by using the p-amino-azo-dyestuffs which are obtained in the well known way from the various aniline-, toluidine-, chloroanilin.e-, chlorotoluidine-, nit'raniline-, aminophenolether-sulphonic acids, etc, and amines, as for example aniline, o-toluidine, p -xylidine, o-anisidine, o-phenetidine, cresidine, etc., p-amino-azo-dyestuffs which are sulphonated inboth nuclei such as aminoazo-toluene-disulphonic acid may also be.

used.

Ewample 3.

34.7 parts of sodium 2-naphthylan1ine-4a8- dlsulphonate are diazotized in the usual manner and coupled with 13.7 parts of cresi- S 03H OCH;

Ha 7 Ho SOaTI In this case the 2-naphthylamine-4.8-d3; sulphon c acid may also, of course, be replaced, by further mono-and disulphonic acids which derive from B- as well as from m-naphthylamine. The eresidine radical may also be replaced by radicals of other primary amines with free 4-position, as for example p-xylidinc, m-toluidine, o-anisidine, 0- toluidine, aniline, etc.-

Emample 2.

30 parts of sodium p-amino-azo-benzol-psulphonate are diazotized in the usual way and the diam-compound is coupled with the lnono-azo-dyestufl obtained, as described in Example 1, from 32 parts of dehydrothiomratoluidine sulphonic acid and 11 parts of resorcinol in presence of soda solution. After completed coupling, the trisazo-dyestufi' thus obtained is salted out, filtered and dried. It is a dark brown powder, which, on addition of soda solution, is soluble in water with a yellow-brown color. In concentrated sulphuric acid-it dissolves with a violet color. It dyes cotton orange-brown tints.

The new dyestufi' corresponds most probably to the formula O N -OH SOsH dine. After completed coupling, the monoazo-dyestuif is further diazotized as'usual with nitrite and hydrochloric acid and combined with the soda solution of the intermediate dyestufi obtained, as described in Example 1, from 32 parts of dehydrothioparatoluidine sulphonic acid and 11 parts of resorcinol. After a short time the coupling is complete. The trisazo-dyestutf, is salted out, filtered and dried. It forms a black brown powder which, on addition of soda solution, dissolves in water with a redbrown color. In concentrated sulphuric acid the productis solublewith violet-grey color. It dyes cotton red-brown tints.

The new dyestufi' corresponds most probably to the formula;-.

Example 4.

yestuff obtained, as described thylamine-4-sulphonic acid or l-naphthylfrom hydroxy groups which ma thioparatoluidine sulphonic acid and 11 parts of resorcinol. After completed coupling, the trisazo-dyestutf is salted out, filtered and dried. It forms a black brown powder, which, on addition of soda, dissolves in water with a violet-brown color.

In concentrated sulphuric acid it is soluble with an olive color. It dyes cotton violetbrown tints.

The new dyestufif corresponds most prohably to the formula SOJII Also in this case other naphthlyamine sulphonic acids may be used instead of 2- naphthylamine-4.8-sulphonic acid, as for example 2-naphthylamine-G-sulphonic acid, or l-naphthylamine-Q-sulphonic acid or 1- naphthylamine-3-sulphonic acid or l-naphamine-5-sulphonic acid or l-naphthylamine- In which one of the ws and one of the ys signifies a sulphonic group and in which the other as and the other y represents a hydrogen atom, forms a black brown powder, which dissolves in concentrated sulphurio acid with a green 00101. On addition of soda solution it is soluble in water with a violetin which R and R are aromatic nuclei free from hydroxy groups, of which at least one carries at least one sulphonic group and of which at least one is a naphthalene nucleus, consisting in coupling in any desired succession one -molecule of resorcinol with one 6-sulphonic acid or l-naphthylaniine- -sulphonic acid or disulphonic acids, as for example 'l-naphthylamine-3.6- or -4.6disulphonic acid. a-naphthylamine may also be replaced by its substitutlon products coupling in 4-position. Thus for example the dyestutf of the formula brown color and also dyes cotton violetbrown tints.

What we claim is 1. The process for the manufacture of new substantive azo-dyestuffs of the probable general formula s -om on N SOaH diazotizedamino-azo-dyestufl' of the general formula:

R,N=NR NH in which R and B, have the above tioned signification.

2. The process for the manufacture of new substantive azo-dyestufis of the probable general formula 3 -CH; -O I) N OH molecule of diazotized dehydrothioparatoluidine sulphonic acid and with one molecule of a diazotized amino-azo-dyestuif of the general formula in which R, and R have the above mentioned signification.

3. The process for the manufacture of in which R, and R are aromatic nuclei free from hydroxy groups, of which at least one carries at least one sulphonic group and of which at least R corresponds to a naphthalene nucleus, con,sisting in coupling in any desired succession one molecule of re sorcinol with one molecule of diazotized dehydrothioparatoluidine sulphonic acid and in which R, and R are aromatic nuclei free from hydroxy groups, which may be different from each. other and of which at least one carries atleast one sulphonic group, the said products forming dark brown to black brownpowders which, on addition of soda solution, dissolve in water with yellow in which R, and It are aromatic nuclei. free from hydroxy groups, of which at least one carries at least one sulphonic group and of which at least one is a naphthalene nucleus, the said products forming dark brown to black brown powders which, on addition of soda solution, dissolve in water with yellow in which R, and R are aromatic nuclei free from hydroxy groups of which at least one new substantive azo-dyestufls of the probable general formula S G H: =N. 6

\N OH SOaH with one molecule of a; diazotized aminoazo-dyestufi' of the general formula R N=NR NH in which R and B, have the above mentioned signification.

4. The process for the manufacture of new substantive azo-dyestuffs of the probable general formula cule of a diazotized amino-azo-dyestufi of the general formula:

in which R, and R have the above mentioned signification.

5. As new products the new substantive azol-dyestufls of the probable general formu a brown tored brown and violet brown colors, and which dye cotton very even, yellowbrown to orange-brown, red-brown, and violet-brown tints.

6. As new products the new substantive azol-dyestuifs of the probable general for mu a s -orn N=N cf \N 011 PM SOaH brown to red brown and violet brown colors and which dye cotton very even, yellowbrown to orange-brown, red-brown, and violet-brown tints.

7. As new products the new substantive azo-dyestufi's of the probable general formula:

at least one sulphonic group and of at least R corresponds to a naphthacarries which with yellow brown to red brown and violet brown colors and which dye cotton very said products forming dark brown to black brown powders, which, on addition of soda solution, dissolve in water with yellow brown to red brown and violet brown colors and which dye cotton very even, yellow-brown to orange-brown, red-brown, and violet-brown tints.

even, yellow-brown to orange-brown, red

brown, and violet-brown tints.

8. As new products the new substantive 'azo-dyestufi's of the probable general formula ' s CH:

9. The material dyed with the dyestuffs of claim 5.

10. The material dyed with the dyestufis of claim 6.

11. The material dyed with the dyestuffs of claim 7.

12. The material dyed with the dyestuffs of claim 8.

In witness whereof we have hereunto signed our names this 12th day of February BERTRAM MAYER;

JOSEF GRIMMER. 

